<h1>Header</h1>

<p>The Header in a movie contains information about the Flash file, identifying 
the version support, size of the Flash Player screen, etc.:</p>

<table class="datasheet">

<tr>
<th nowrap>Field Name</th>
<th>Type</th>
<th>Size</th>
<th>Description</th>
</tr>

<tr>
<td nowrap valign="top">signature</td>
<td nowrap valign="top">String</td>
<td nowrap valign="top" align="right">3</td>
<td>The signature is a three character code that identifies that the file contains 
Flash encoded data. For Flash versions 1 to 5 this was 'F', 'W', 'S' ("SWF" 
reversed). In Flash 6, zlib compressed files were introduced to reduce file sizes. 
Compressed files are identified by the signature,  'C', 'W', 'S'.</td>
</tr>

<tr>
<td nowrap valign="top">version</td>
<td nowrap valign="top">unsigned int</td>
<td nowrap valign="top" align="right">1</td>
<td>The version of Flash that is contained in the file.</td>
</tr>

<tr>
<td nowrap valign="top">length</td>
<td nowrap valign="top">unsigned int</td>
<td nowrap valign="top" align="right">32</td>
<td>The total number of bytes in the movie.</td>
</tr>

<tr>
<td nowrap valign="top">frameSize</td>
<td nowrap valign="top">Bounds</td>
<td nowrap valign="top" align="right">&nbsp;</td>
<td>The Bounds that defines the size of the Flash Player's screen when playing the movie.</td>
</tr>

<tr>
<td nowrap valign="top">frameRate</td>
<td nowrap valign="top">fixed point number</td>
<td nowrap valign="top" align="right">8.8</td>
<td>The number of frames per second that the movie will be played at.</td>
</tr>

<tr>
<td nowrap valign="top">frameCount</td>
<td nowrap valign="top">unsigned int</td>
<td nowrap valign="top" align="right">16</td>
<td>The number of frames in the movie.</td>
</tr>

</table>
